TB 9-6625-2076-24
Table 10. Glideslope DDM
Test instrument
Calculated ratio limits
DDM settings
Min
Max
0.045
1.11864
1.11979
0.091
1.25066
1.25733
0.175
1.55918
1.56082
0.400
2.99800
3.00200
(13) Press STD, RDL/DDM, enter the first DDM setting in Table 11 into TI, and
then press T/F U/L D/R pushbuttons.
(14) Press TONE SELECT 90 Hz pushbutton (all other TONE SELECT
pushbuttons off). Record multimeter indication.
NOTE
Proper DDM steps can be entered by pressing
FUNCTION/CONTROL STEP RDL DDM pushbutton.
(15) Press TONE SELECT 150 Hz pushbutton (all other TONE SELECT
pushbuttons off). Record multimeter indication
(16) Divide value recorded in (14) above by the value recorded in (15) above.
Calculated ratio will be within limits specified in Table 11.
(17) Repeat technique of (14) through (16) above for the remaining DDM settings
listed in table 11. Calculated ratio will be within limits specified.
Table 11. Glideslope DDM
Test instrument
Calculated ratio limits
DDM settings
Min
Max
0.045
1.11864
1.11979
0.091
1.25066
1.25733
0.175
1.55918
1.56082
0.400
2.99800
3.00200
b. Adjustments. No adjustments can be made.
17. AM Modulation
NOTE
Throughout this performance check, press TONE SELECT
All other TONE SELECT
pushbutton as instructed.
pushbuttons must be off.
NOTE
Verify that the proper CAL FACTORS are loaded for the power
sensor module.
a. Performance Check
(1) Connect measuring receiver to TI RF OUT.